8118820 has 24 divisors (see below), whose sum is σ = 17467128. Its totient is φ = 3168000.

The previous prime is 8118791. The next prime is 8118823. The reversal of 8118820 is 288118.

It can be written as a sum of positive squares in 4 ways, for example, as 861184 + 7257636 = 928^2 + 2694^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8118823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4131 + ... + 5770.

It is an arithmetic number, because the mean of its divisors is an integer number (727797).

Almost surely, 2^8118820 is an apocalyptic number.

It is an amenable number.

8118820 is an abundant number, since it is smaller than the sum of its proper divisors (9348308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8118820 is a wasteful number, since it uses less digits than its factorization.

8118820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951 (or 9949 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 8118820 is about 2849.3543128225. The cubic root of 8118820 is about 200.9853045699.

It can be divided in two parts, 8 and 118820, that added together give a triangular number (118828 = T₄₈₇).

The spelling of 8118820 in words is "eight million, one hundred eighteen thousand, eight hundred twenty".